Home | History | Annotate | Download | only in utils 
      1 /*
      2  * freq.c
      3  *
      4  * Copyright(c) 1998 - 2009 Texas Instruments. All rights reserved.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  *
     11  *  * Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  *  * Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in
     15  *    the documentation and/or other materials provided with the
     16  *    distribution.
     17  *  * Neither the name Texas Instruments nor the names of its
     18  *    contributors may be used to endorse or promote products derived
     19  *    from this software without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     22  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     23  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     24  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     25  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     26  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     27  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     28  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     29  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     31  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     32  */
     33 
     34 /** \file  freq.c
     35  *  \brief frequency to channel (and vice versa) conversion implementation
     36  *
     37  *  \see   freq.h
     38  */
     39 
     40 
     41 #define __FILE_ID__  FILE_ID_126
     42 #include "osTIType.h"
     43 
     44 #define     CHAN_FREQ_TABLE_SIZE        (sizeof(ChanFreq) / sizeof(CHAN_FREQ))
     45 
     46 typedef struct {
     47     TI_UINT8       chan;
     48     TI_UINT32      freq;
     49 } CHAN_FREQ;
     50 
     51 static CHAN_FREQ ChanFreq[] = {
     52     {1,  2412000},
     53     {2,  2417000},
     54     {3,  2422000},
     55     {4,  2427000},
     56     {5,  2432000},
     57     {6,  2437000},
     58     {7,  2442000},
     59     {8,  2447000},
     60     {9,  2452000},
     61     {10, 2457000},
     62     {11, 2462000},
     63     {12, 2467000},
     64     {13, 2472000},
     65     {14, 2484000},
     66     {34, 5170000},
     67     {36, 5180000},
     68     {38, 5190000},
     69     {40, 5200000},
     70     {42, 5210000},
     71     {44, 5220000},
     72     {46, 5230000},
     73     {48, 5240000},
     74     {52, 5260000},
     75     {56, 5280000},
     76     {60, 5300000},
     77     {64, 5320000},
     78     {100,5500000},
     79     {104,5520000},
     80     {108,5540000},
     81     {112,5560000},
     82     {116,5580000},
     83     {120,5600000},
     84     {124,5620000},
     85     {128,5640000},
     86     {132,5660000},
     87     {136,5680000},
     88     {140,5700000},
     89     {149,5745000},
     90     {153,5765000},
     91     {157,5785000},
     92     {161,5805000}
     93   };
     94 
     95 TI_UINT8 Freq2Chan (TI_UINT32 freq)
     96 {
     97     TI_UINT32   i;
     98 
     99     for (i = 0; i < CHAN_FREQ_TABLE_SIZE; i++)
    100     {
    101         if (ChanFreq[ i ].freq == freq)
    102         {
    103             return ChanFreq[ i ].chan;
    104         }
    105     }
    106 
    107     return 0;
    108 }
    109 
    110 
    111 TI_UINT32 Chan2Freq (TI_UINT8 chan)
    112 {
    113     TI_UINT32   i;
    114 
    115     for (i = 0; i < CHAN_FREQ_TABLE_SIZE; i++)
    116     {
    117         if (ChanFreq[ i ].chan == chan)
    118         {
    119             return ChanFreq[ i ].freq;
    120         }
    121     }
    122 
    123     return 0;
    124 }
    125 
    126